Messages in this thread | | | From | Thomas Gleixner <> | Subject | Re: [PATCH] x86,mm: print likely CPU at segfault time | Date | Wed, 21 Jul 2021 22:38:32 +0200 |
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On Mon, Jul 19 2021 at 15:34, Rik van Riel wrote:
> On Mon, 2021-07-19 at 12:20 -0700, Dave Hansen wrote: > >> If it's as trivial as: >> >> printk(KERN_CONT " on cpu/core %d/%d", >> raw_smp_processor_id(), >> topology_core_id(raw_smp_processor_id())); >> >> it would be handy. But, it's also not hard to look at 10 segfaults, >> see >> that they happened only on 2 CPUs and realize that hyperthreading is >> enabled. > > One problem with topology_core_id() is that that, on a > multi-socket system, the core number may not be unique.
Just add topology_physical_package_id() and you have a complete picture.
Thanks,
tglx
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